Khakbaz, Amir, Ali S. Nookabadi, and Seyyed N. S. Boushehri. 2017. “Urban Bus Fleet Routing in Transportation Network Equipped With Park-and-Ride: A Case Study of Babol, Iran”. Transport 32 (1):55–65. https://doi.org/10.3846/16484142.2017.1277551.